Soil-transmitted helminth egg contamination from soil of indigenous communities in selected barangays in Tigaon, Camarines Sur, Philippines

ABSTRACT

To provide baseline data on the prevalence and intensity of soil-transmitted helminthiasis egg contamination in the soil among indigenous communities. Methods: A total of 317 soil samples from three barangays of indigenous communities communities in Tigaon, Camarines Sur, Philippines were examined for soil-transmitted helminthiasis egg contamination using optimized sugar flotation method. Results: Of the soil samples examined, 141 (44.48%) were contaminated by Ascaris spp., Toxocara spp., and Trichuris spp. with cumulative prevalence varying across the study sites (P0.01). Ascaris spp. was predominant in all study sites, followed by Toxocara spp. and Trichuris spp. with a prevalence of 41.96%, 7.57%, and 5.36%, respectively. Interestingly, Toxocara pp. has the highest intensity of contamination, followed by Ascaris spp. and Trichuris spp. in term of geometric mean soil-transmitted helminthiasis eggs recovered per one gram soil sample (34.25, 21.45, and 11.85 respectively). Each study site harbors significant amount of soiltransmitted helminthiasis eggs and zoonotic Toxocara eggs, which present high risk of soil-transmitted helminthiasis infection, particularly among children observed to play and cohabitate with animals known to be hosts of these parasites. Conclusions: The alarming rate of soil-transmitted helminthiasis and Toxocara egg contamination reported in this study suggests that additional measures should be undertaken to control soil-transmitted helminthiasis and zoonotic intestinal infections in the country.